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Formula: Cu5Se4
Selenide
Crystal System: Orthorhombic
Specific gravity: 6.59 calculated
Hardness: 2½
Colour: Light grey, bluish grey to white
Common impurities: S
Environments
Volcanic igneous environments
Hydrothermal environments
Localities
At Sierra de Umango, Villa Castelli, General Lamadrid department, La Rioja Province, Argentina, athabascaite is associated
with umangite and berzelianite
(HOM).
At the type locality, the Martin Lake mine, Beaverlodge Lake area, Saskatchewan, Canada, athabascaite occurs as lath-shaped
inclusions in umangite and as stringers and veinlets in
hematite-stained carbonate vein material in basalt
(CM 10.207-215). Associated minerals include uraninite,
umangite, tyrrellite,
silver, quartz,
pyrite, klockmannite,
hematite, feldspars,
eucairite, eskebornite,
copper, clausthalite,
calcite, berzelianite and
baryte
(HOM).
At Petrovice, Nové Město na Moravě, Žďár nad Sázavou District, Vysočina Region, Czech Republic, athabascaite is associated
with berzelianite, eucairite,
crookesite, tyrrellite,
ferroselite, bukovite,
krut'aite, calcite and
dolomite
(HOM).
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